pre 2017 scathis was a monster that cost about 2 t3 arty and outputted 5-6 t3 arty worth of damage on 10x10 maps. Late game hilly/wonder/canis was decided by scathis rush. It was irrelevant on 20x20 because of the bad range.
Then the cost was increased and it became entirely useless.
Then it was brought in line with other game enders so Cybran now had their own niche in the game ender stage rather than either an entirely overpowered proto-game ender or entirely useless t4.